The use of acoustic control method for parts made of composite materials

The control of modern plastic materials using acoustic emission after machining is considered. These materials are widely used in the production of machine parts, as substitutes for non-ferrous metals (lead, copper, zinc, brass, bronze) and rare materials with specific physical and mechanical properties (alloyed steels). The production conditions for measurement and control of material properties is necessary to destroy the integrity of the test sample, which is often costly and time. In the test applied acoustic (ultrasonic) method for non-destructive quality control of plastics, which is to use the ability of ultrasonic waves to penetrate at high speed (up to 12,000 m / s) in the material and reflected from the surface of media with different acoustic properties. The method used to find defects, thickness measurement and moisture measurement, study welds in plastic tubes, studies joint quality plastic pipes and fittings using binder solutions. There are three basic methods of application of ultrasound to detect internal defects: shadow, echo method and resonance. Studies plastics reveal the internal defects, debris and heterogeneity without destroying the product NDT methods, in particular the echo method. Data is written to the memory flaw in a protocol of control. Graphically defectogram detected defect is fixed, specified data on the details of identified defects and parameter control. The test sample is detected with an inner portion of a defect in a discontinuity that belongs to unacceptable defects, since the amplitude of the echo signal exceeds the level of rejection. Using the survey data, and nondestructive inspection in enterprises allow to make timely adjustments in manufacturing processes and machining thereby reducing the time and costs of production.

non-destructive testing, the echo method, ultrasound, plastic materials, surface quality, process control, processing of materials